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Search Results: 1 - 10 of 4694 matches for " Erik Forsberg "
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Super/Zero Scattering Characteristics of Circular Srr Arrays
Yuan Zhang;Erik Forsberg;Sailing He
PIER , 2013, DOI: 10.2528/PIER13020602
Abstract: The ability to control the scattering property of an object is important in many applications. In this paper, we propose and study the scattering characteristics of a circular array of split-ring resonators (SRRs). By calculating the scattered energy spectrum, we show that the proposed structure has a localized surface plasmon resonance like behavior, which makes it useful as a super scatterer. Furthermore, in a special case, the proposed structure exhibits transparency to the illuminated waves, i.e. it does not scatter any energy at all and thus acts as a zero electromagnetic scattering object.
Interaction-Free Measurements, Atom Localisation and Complementarity
Anders Karlsson,Gunnar Bjork,Erik Forsberg
Physics , 1997,
Abstract: We analyse interaction-free measurements on classical and quantum objects. We show the transition from a classical interaction free measurement to a quantum non-demolition measurement of atom number, and discuss the mechanism of the enforcement of complementarity in atom interferometric interaction-free measurements.
Correction of Diabetic Hyperglycemia and Amelioration of Metabolic Anomalies by Minicircle DNA Mediated Glucose-Dependent Hepatic Insulin Production
Tausif Alam, Philip Wai, Dustie Held, Sahar Taba Taba Vakili, Erik Forsberg, Hans Sollinger
PLOS ONE , 2013, DOI: 10.1371/journal.pone.0067515
Abstract: Type 1 diabetes mellitus (T1DM) is caused by immune destruction of insulin-producing pancreatic β-cells. Commonly used insulin injection therapy does not provide a dynamic blood glucose control to prevent long-term systemic T1DM-associated damages. Donor shortage and the limited long-term success of islet transplants have stimulated the development of novel therapies for T1DM. Gene therapy-based glucose-regulated hepatic insulin production is a promising strategy to treat T1DM. We have developed gene constructs which cause glucose-concentration–dependent human insulin production in liver cells. A novel set of human insulin expression constructs containing a combination of elements to improve gene transcription, mRNA processing, and translation efficiency were generated as minicircle DNA preparations that lack bacterial and viral DNA. Hepatocytes transduced with the new constructs, ex vivo, produced large amounts of glucose-inducible human insulin. In vivo, insulin minicircle DNA (TA1m) treated streptozotocin (STZ)-diabetic rats demonstrated euglycemia when fasted or fed, ad libitum. Weight loss due to uncontrolled hyperglycemia was reversed in insulin gene treated diabetic rats to normal rate of weight gain, lasting ~1 month. Intraperitoneal glucose tolerance test (IPGT) demonstrated in vivo glucose-responsive changes in insulin levels to correct hyperglycemia within 45 minutes. A single TA1m treatment raised serum albumin levels in diabetic rats to normal and significantly reduced hypertriglyceridemia and hypercholesterolemia. Elevated serum levels of aspartate transaminase, alanine aminotransferase, and alkaline phosphatase were restored to normal or greatly reduced in treated rats, indicating normalization of liver function. Non-viral insulin minicircle DNA-based TA1m mediated glucose-dependent insulin production in liver may represent a safe and promising approach to treat T1DM.
Mathematics and Puppet Play as a Method in the Preschool Teacher Education  [PDF]
Mirella Forsberg Ahlcrona, Ann ?stman
Creative Education (CE) , 2018, DOI: 10.4236/ce.2018.910113
Abstract: This study explores students’ perceptions and understanding of mathematics as a subject and using aesthetic expressions in their own mathematics teaching in preschool, more specifically, with puppet play as a method. In all teacher education in Sweden, mathematics in preschool?is?taught in different ways,?which means that the teaching about the aesthetic possibilities as a part of the teaching of mathematics in preschool varies. The main purpose of the study has been to investigate students’ mathematical development in preschool practice based on the changes made in the educational and methodological implications during teacher education. The data collection consists of texts from 73 students. The qualitative content analysis focuses on the students’ descriptions of understanding and meaning of mathematics and aesthetics in their own teaching with the children. The results show that the methodological implications in the courses organization and structure enabled a variation of qualitative changes in the students perceptions and beliefs about mathematics and aesthetics, but also that the conceptual languages?of mathematics could be varied and concretized by new methodological strategies.
Health impact assessment of particulate pollution in Tallinn using fine spatial resolution and modeling techniques
Hans Orru, Erik Teinemaa, Taavi Lai, Tanel Tamm, Marko Kaasik, Veljo Kimmel, Kati Kangur, Eda Merisalu, Bertil Forsberg
Environmental Health , 2009, DOI: 10.1186/1476-069x-8-7
Abstract: Tallinn was divided into 84 sections according to neighborhoods, with a total population of approx. 390 000 persons. Actual baseline rates for total mortality and hospitalization with cardiovascular and respiratory diagnosis were identified. The exposure to fine particles (PM2.5) from local emissions was defined as the modeled annual levels. The model validation and morbidity assessment were based on 2006 PM10 or PM2.5 levels at 3 monitoring stations. The exposure-response coefficients used were for total mortality 6.2% (95% CI 1.6–11%) per 10 μg/m3 increase of annual mean PM2.5 concentration and for the assessment of respiratory and cardiovascular hospitalizations 1.14% (95% CI 0.62–1.67%) and 0.73% (95% CI 0.47–0.93%) per 10 μg/m3 increase of PM10. The direct costs related to morbidity were calculated according to hospital treatment expenses in 2005 and the cost of premature deaths using the concept of Value of Life Year (VOLY).The annual population-weighted-modeled exposure to locally emitted PM2.5 in Tallinn was 11.6 μg/m3. Our analysis showed that it corresponds to 296 (95% CI 76528) premature deaths resulting in 3859 (95% CI 10236636) Years of Life Lost (YLL) per year. The average decrease in life-expectancy at birth per resident of Tallinn was estimated to be 0.64 (95% CI 0.17–1.10) years. While in the polluted city centre this may reach 1.17 years, in the least polluted neighborhoods it remains between 0.1 and 0.3 years. When dividing the YLL by the number of premature deaths, the decrease in life expectancy among the actual cases is around 13 years. As for the morbidity, the short-term effects of air pollution were estimated to result in an additional 71 (95% CI 43–104) respiratory and 204 (95% CI 131–260) cardiovascular hospitalizations per year. The biggest external costs are related to the long-term effects on mortality: this is on average €150 (95% CI 40–260) million annually. In comparison, the costs of short-term air-pollution driven hospitalizations
Acta Veterinaria Scandinavica – now an open access journal
Mats Forsberg
Acta Veterinaria Scandinavica , 2006, DOI: 10.1186/1751-0147-48-1
Abstract: Why 'open access'?Traditionally, readers pay to access research articles, either through subscriptions or by paying a fee each time they download an article. Escalating journal subscription charges have resulted in libraries subscribing to fewer journals [3], and the range of research available to readers is therefore increasingly limited. Having to pay to access research articles limits how many can read, use and cite them. Often only the title, keywords, and abstract are available for free. As a consequence, many researchers read only the abstract of the paper they are interested in, rather than the full article.From a scientific point of view, a far better strategy is to offer all readers unrestricted access to the full articles. Such a strategy has at least three benefits. First, authors are assured that their work is disseminated to the widest possible audience and the authors are free to reproduce and distribute their work. Second, the information available to researchers will not be limited by their library's budget. Third, a country's economy will not influence its scientists' ability to access research.To encourage submissions, Acta Veterinaria Scandinavica will provide a quick and impartial closed peer-review process. The Editor-in-Chief/Deputy Editors will first examine manuscripts, and submissions meeting the journal's standards will then result in appropriate reviews (the Editorial Board of Acta Veterinaria Scandinavica [4] includes 25 associate editors). Authors and reviewers will be required to complete a declaration of competing interests. Based on referee reports the Editor-in-Chief/Deputy Editors will make a final decision regarding acceptance of the manuscripts. If accepted, manuscripts will be published online immediately, which will be followed by PubMed listing.To enable the journal to make all of its content open access, Acta Veterinaria Scandinavica will levy an article-processing charge (APC) for each manuscript accepted after peer review (p
Luftb ren laserscanning til st tte af klima- og milj overv gningen
Ren Forsberg
Geoforum Perspektiv , 2007,
Acta Veterinaria Scandinavica – now an open access journal
Forsberg Mats
Acta Veterinaria Scandinavica , 2006, DOI: 10.1186/1751-0147-1-1
Framtidsv gen - en huvudled eller en skiljev gg?
Eva Forsberg
Utbildning & Demokrati : Tidsskrift f?r Didaktik och Utbildningspolitik , 2008,
Abstract: Path to the Future – the way forward or a fork in the road? Inthis article the upper secondary school commission’s report Path to the Future – a reformed upper secondary school is analysed with reference primarily to its attention to assessment. It is concluded that assessment forms both figure and ground in the report, and the consequences of this are discussed. With a focus on assessment as both a pedagogical device and a steering mechanism, assessment in terms of passages for entrance, passing through, exit and crossover is discussed, along with the question of whether or not the proposals put forward in Path to the Future represent the way forward or a fork in the road.
Bygdedr mmar m ter byr krati Kamp f r lokala perspektiv och v rden
Anette Forsberg
Utbildning & Demokrati : Tidsskrift f?r Didaktik och Utbildningspolitik , 2009,
Abstract: Community vs. bureaucracy. The struggle for local perspectives andvalues. In this article, collective action for the community is interpreted as a possibility for rural inhabitants to reclaim their community as important and valuable. Research has shown that community development in rural Sweden is about such different matters as services, employment, infrastructure, upholding local identity and developing new forms of local democracy. Politically, local development activities are often understood in terms of growth, development and economics. An economic approach is also stressed in the EU programmes that support local development groups and projects. Here, the author argues that an economic, bureaucratic understanding tends to make invisible a holistic, relation-based approach to community that is expressed in the struggle for community. Giddens’ (1991) theory of life politics is used to show how community development is about questions that have been removed from the political agenda, questions concerning the value of self and others and a holistic perspective of life. To understand what the concept of community struggle expresses, the author argues, it needs to be acknowledged as actions that have the potential to challenge established bureaucratic and political definitions, something which, in practice, proves to be difficult.
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